Improvement in escapements for toy watches



A 3E8"? AVAELABLC. COP

2 Sheets-13.11991; 1. J. G. POWELL.

Esoapement for Toy-Watches No. 204,606., Patented lune 4,1878;

I fllllllilll BEST AVAiLABLE COP 2 Sheets-Sheet 2 J. G. POWELL.Esoapement for-Toy Watches; No. 204,606. P g tentedJune 4, 1878,

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JOHN G. POWELL, OF PHILADELPHIA, PENNSYLVANIA.

.IMPROVEMENT IN ESGAPEMENTS FOR TOY WATCHES.

Specification forming part of Letters Patent No. 204,606, dated June- 4,1878; application filed April 29, 1878.

To all whom it may concern:

Be it known that 1, J 011w G. POW'ELL, of

. Philadelphia, Pennsylvania, have invented a new and useful Improvementin Escap'ement Motors for Toy Watches, &c., of which thefollowing is aspecification:

The main object of my invention is to so combine a duplex palletwheel ina toy ".wa'tch, toy clock, time-keeper, or other motor with apallet-lever that there shall be a ,mprq de,'erminate and certain actionof the escap'en ent than when a single pallet-wheel is. used.

My invention is also directed to improvements, fully describedhereinafter, in toy watches.

In the accompanying drawing, Figurel is a sectional view of a toy watchwith duplex pallet-wheel; Fig. 2, a transverse section of the same; Fig.3, a perspective view of the pallet-lever for Figs. 1 and 2; Fig. 4, asectional view of the watch, showing a modified duplex palletwheel; Fig.5, a perspective view of the pallet-lever for Fig. 4; Figs. 6 and 7,perspective views showing the mode of making the rim of thebalance-wheel; Figs. 8 and 9, diagrams illustrating the action of --theescapement in Figs. 1 and 2; Figs. 10 and'll, detached views of parts ofthe toy watch Figs. 12, 13, 14, and 15, views showing the mode which Iprefer of making the duplex pallet-wheel; Figs. 16 and 17 vies sliowin gthe mode of constructing the balance-wheel; and Fig. 18, a sectionalview of a toy watch with single pallet-wheel. i

In Figs. 1 and 2, A is the outer casing of the watch, and a the glass infront of the same, B being the inner casing; D, the central spindle,having its hearings in the opposite sides of the inner casing, and b thepointer secured to the spindle.

Q11 the front d of the inner casing B is made an internal fixed journalfor the pinion E by partially severing the metal at three points, (shownin Fig. 11,) so as to form three tongues, c e e, which are bent inwardand together form the desired journal, on which the pinion E revolves,the said pinion being retained in place bending the ends of the tongues.This pinion gears into a wheel, F, which has a tubular projection madeby forcing outward the central portion of the wheel, thus forming ajournal, which has its bearing in the front (1 of the inner casing.

The wheelF gears into a pinion on the stem of the watch, as described inthe Letters Patent No. 190,362, granted to me May 1, 1877. Aspring-pawl, o, prevents the turning of the wheel F in the wrongdirection.

One end of a coiled spring, G, is secured to the pinion E, the other endbeing attached to one of the projectionsf on a pallet-wheel, I-I,secured to the spindle l), and to this wheel is secured a secondpallet-wheel, I, larger in diameter than but; having the same number ofteeth as the first wheel.

The method which I prefer to adopt in makin g this duplex pallet-wheelfor toy watches will be best understood by reference to the detachedviews, Figs. 12, 13, 14, and 15.

The wheel H is struck out at one operation by a punch and die from asheet of ordinary tinned plate, and four holes, h, of the shape shown inFig. 12, are cut in the wheel, a lip, f, projecting into each hole.

The wheel I consists of a ring of tinned plate with teeth on the outeredge and araised rib, j, on the inner edge. v

The lips f of the wheel H are passed through the ring of the wheel 1until the rib j of the latter is in contact with the wheel 11. Byapplying heat to the two wheels :1. union will be effected through themedium of the tinned portions in contact with each other, and theduplezt pallet-wheel will be complete, the projecting lips f, to one ofwhich one end of the coiled spring is attached, as remarked, serving toconfine the said coiled spring within proper limits.

It will be understood that other modes of making theduplex pallet-wheelmay be adopted when it has to be applied to time-keepers; but I preferthe plan described above for toy watches on account of its economy.

K is the balance-wheel, hung loosely on the central spindle, and havinga pinion, L, gearing into a toothed segment, 70, on the palletlever M,which is of the form best observed in Fig. 3, and which is hung to twopins, :v w, within the inner casing B of the watch, one projectinginwardly from one side and the connection with the dupldx let-wheel.

558T AVAiLABLE CG? other from the opposite side? (if thejsaid innercasing. The operation of tl-it pal'Jet-lever in i palleii-wheel will beexplained hereinafter.

The 'mode of cheaply makingihc rim of the balance-wheel is shown in]ljigs. Gland 7, and consists in first coiling a lilq s, l, round amandrel of suitable diameter, and then severing the coil 0n the dottedline, Fig. 6, thereby separating it into as many rims as there arecoils.

An enlarged view of the balance-wheel and mode of constructing the sameis shown in Figs. 16 and 17.

A cross-bar, n, punched out of tinned plate, is clamped at its oppositeends to the rim m,

the bar having a central dished hub, n, to

which is soldered the pinion L, the latter consisting, in the firstinstance, of a piece of thin sheet metal, of the form shown in Fig. 17,with a number of radial arms, which are bent at right angles to form theteeth, the latter fitting snugly into the dishedhub to which they aresoldered. l

The action of the pallet-ley r. and duplex pallet-wheel may bebest,expl' inbd in connection with the diagrams, Figs. 8 and 9, Sheet 2,on reference to which it will be observed that the palletlever L1 hastwo pallets, p and p, the former being acte upon by the teeth of thesmall pallet-wheel H, and the pallet p by the teeth tof the largerpallet-wheel I.

This arrangement enables me to employ such pallets and that both wheelsshall act on the pal et-lever through a more determined leverage thancan be attained bya single pal- Thus, in Fig. 8, the duplex palletwheelbeing turned in the direction of its arrow by the spring, and a tooth,q, of the wheel H acting on the end of the pallet p, force will beexerted, through a leverage, to move the pallet-lever M in the directionof its arrow. In Fig. 9 the same lever is being moved in the contrarydirection by a tooth, t,

of the larger wheel I acting on the pallet 11,

' this movement being also elfected through a leverage, owing to therelation of the center of the pivot-pin and .of the palletto the teethof the wheel, this center being at a point between the bases of theteeth q of the wh eel H and the points of the teeth of the wheel I. Nosuch leverage can be obtai ed for the two movements by a single paJet-wheeI. This leverage is of especial importance in toy watches, inmaking which, at the necessary I cheap rate, perfect exactitude inworkmanship cannot be attained; but the leverage exerted by the twopallet-wheels to vibrate the palletlever is such that; the movement ofthe latter will be continued in spite of slight defects in the palletsor teeth.

The efi'ect of the duplex pallet-wheel may still further be understoodby comparing it with thepl au shown in Fig. 18, in which a singlepadetwheel is used substantiallyin the manner escribed in the LettersPatent No. 17l,851, granted to me J a-nuary 4., 1876.

A dup ex pallet-wheel may he made in the manner shown in Fig. 4, wherean annular zigzag rib is secured to a plate or disk on the centralspindle, the external projections formed by this rib being the teeth ofthe larger palletwheel, and the in ernal projections being the teeth ofthe smaller wheel. In usin aduplex wheel of this kind the pallets of thepallet lever must be arranged substantially in the manner shown in Fig.5.

Although I have referred in the above description to the main feature ofmy invention, the duplex pallet-wheel, as applied to a -toy watch, itmay be used with advantage in connection with' time-keepers, and mayalso constitute a inotoi' or part of a motor for toys and other likepurposes.

I claim as my invention- I 1. In a toy watch, toy clock, time-keeper, orother motor, an escapement-motion consisting of two pallet-wheels, oneof less diameter than the other, and a pallet-lever, one pallet of whichis acted on by the teeth of one wheel and the other by the teeth ot'theother wheel, all substantially as set forth, for the purpose specified.

2. The combination of the duplex palletwheel and. the pallet-lever withthe inner case B of the toy watch, toy clock, or other motor, and thepivotpins w a: for the said lever, the said pins projecting inward fromopposite sides of the case, all substantially as set forth.

3. Thewithin-described duplex pallet-wheel, consisting of the wheel H,with its bent lips f .and the toothed ring I, the two being securedtogether, all substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

J OHN G. POWELL.

Witnesses:

HARRY A. Oanwronn, HARRY SMrrH.

